Sole-edge-trimming machine.



NITED STATES FFICE.

PATENT SOLE-EDGE-TRIMMING MACHINE.

SPECIFICATION forming part of Letters Patent N 0. 668,750, datedFebruary 26, 1901.

Application filed July 31. 1900.

To a whom it may concern:

Beit known that I, FREDERICK M. FURBER, of Haverhill, in the county ofEssex and State of Massachusetts, have invented certain new and usefulImprovements in Sole-Edge-Trimming Machines, of which the following is aspecification.

This invention has relation to sole-trimming machines of the typewherein there are employed a cutter having cutting-blades, a yieldingfeather-edger with bufier-blades, and a casing having a chamberinclosing the latter. Such machines are rotated at a high rate of speed,and therefore subject to constant wear of the'contacting parts. In orderto perform work properly, however, it is essential that thecutter-blades and the blades of the feather-edger should be properlycentered and remain true to their supportingbearings.

Consequently one object of the present invention is to provide improvedmeans for centering the cutter and the feather-edger upon the shaft andfor taking up or compensating for any wear of one part upon another.

To attain this object, the invention consists of an edge-trimmingmachine having certain novel features of construction and arrangement ofparts, as illustrated upon the drawings, described hereinafter indetail, and particularized in the appended claims.

Referring to the accompanying drawings, on which similar referencecharacters indicate similar parts or features, as the case may be,wherever they occur, Figure 1 represents one form of an edge-trimmingmachine embodying my invention. Fig. 2 represents a longitudinal sectionthrough the same. Fig. 3 represents the end of the shaft or arbor. Fig.4. represents the centering thimble or sleeve for the cutter. Fig. 5represents the expanding sleeve detached. Fig. 6 represents anotherembodiment of the invention in which the thimble for the cutter isadapted to expand. Fig. 7 illustrates in perspective view the combinedsleeve and thimble employed in the device shown in the last-mentionedfigure. Fig. 8 represents a collar employed in both embodiments of theinvention. Fig. 9 represents the arbor.

Referring to the drawings, the arbor is in Serial No. 25,416. (Nomodel.)

dicated at a. It may be mounted in bear ings, as ordinarily, although Iprefer to mount it in a manner to be subsequently explained. The end ofthe arbor is chambered out at a, as shown, and also has a threadedaperture (1 the chamber a being provided in order that the arbor may beplaced in a lathe or other machine to true it, and the aperture beingadapted to receive a screw, as will be explained. Upon the arbor and ata short distance from the end thereof is a sleeve b, the end of whichabuts against a sleeve on the arbor. At one end the sleeve b is formedwith the peripheral flange b, and at its other end it is threaded, as at6 while between its ends there. is an external beveled or frustoconicalflange 12 which serves as a wedge, as will be explained. The flange bishollowed out to form a chamber b adapted to receive a taperingthimblec, which is placed upon the extremity of the arbor a, there beingbetween the larger end of the thimble and the wall of the chamber 17 ahelical spring c. The sleeve 1) is secured rigidly to the arbor by ascrew or pin b while the thimble c is secured to the arbor to rotatetherewith, but is adapted to slide longitudinally thereof, having, asshown in Fig. 4, a slot 0 through which a pin or screw 0 passes into thearbor.

Upon the sleeve 12 there is an expanding shell d, which is normallysubstantially equal in cross-diameter to the diameter of the flange b.The said shell is provided wiih a series of slots (1 (1, extending fromeach end part way to the other end. Between its ends the shell is formedwith an internally-tapering flange d adapted to register with the flange19 so that moving the shell longitudinally of the arbor toward the endof the latter the flange d sliding upon the flange b expands the saidshell. To move the shell, there is a nut e, threaded upon the sleeve band having a notched flange e, by which it may be turned.

The cutter is indicated at f, and it has, as ordinarily, the hub f andthe blades f the edges of which are arranged in a circle.

9 indicates the rand-guard, which is formed in the usual manner andwhich is secured to the arbor by a headed screw g, passed into theaperture a The said rand-guard, which is in the form of a disk, bearsagainst the end of the cutter and when the screw g is driven in forcesthe cutter radially of the shaft until it abuts against the end of theflange l).

The thim hie c is, as previously stated, tapering, and when it isengaged by the edge f of the hub of the cutter it yields and enters thechamber 1)". The spring 0, however, is of suflicient strength to holdthe thimble outward with a firm pressure to wedge between the cutter andthe arbor and to center the former upon the latter.

it indicates the hub of a casing h, placed upon the shell (Z, and onsaid hub his placed the feather-edger 2, having a plurality of radial butiter-blades t", adapted to enter between the blades of the cutter.Inserted between the hub of the feather-edger and the hub of the casingthere is an internally-thread ed bushingj, in threaded engagement withthe hub h and having a longitudinal slot to receive a projection of thehub of the featheredger i, said slot and projection not being shown. Therear end of the bushing serves as a stop against which the hub of thefeatheredger is held by a helical spring t bearing against its rear end.The end of the bushing is notched to receive a tool, by which it may berotated to adjust the blades of the feather-edger relatively to theblades of the cutter. It will be seen that according to thisconstruction the casing of the feather-edger may be clamped to the arborby rotating the nut c to expand the shell d.

The shell is provided with a plurality of apertures to permit of theescape of cuttings and to prevent their accumulation in the chamber ofthe casing and also to permit a free circulation of air to keep theparts cool.

From this description it will be obvious that the cutter and thefeather-edger may both be clamped firmly to the arbor and be properlycentered relatively thereto, and that by the provision of the taperedthimble and the adj ustable expansible shell the parts may be adjustedto compensate for wear.

In Figs. 6 and 9 I have illustrated another embodiment of the inventionin which the sleeve 1) and the thimble c are formed in one integralpart. In this case the sleeve is indicated at k and the thimble at 76,being separated by a flange corresponding to the flange b in Fig. 2. Theend of the arbor is slightly tapered, as indicated at m, and on the endof the thimble there is a tapering internal flange adapted to engage thetapered part of the arbor. The front end of the sleeve is split so thatthe thimble is expansible, and hence when the cutter is placed upon thesleeve until the end of its hub engages the flange k and the screw g isdriven home the sleeve is moved longitudinally of the arbor to wedge thesections of the thimble apart and firmly center the cutter and clamp ittightly to the arbor. The rear portion of the sleeve, which is adaptedto receive the shell, is substantially similar to that previouslydescribed. Referring now to Fig. 9, it will be seen that between thearbor and the bearing there is placed a bushing n, which is pinned tothe arbor by a pin 0. The arbor is reduced at several points, as at 0 0to form air passages or chambers 0 0 The flange or shoulder a is notchedto permit air to flow into chamber 0 the notch being arranged at anangle to the axis of the arbor. Between the chambers there is a helicalchannel 0, formed by cutting coarse threads, there being a similarchannel 0 between chambe o and the end of the arbor. This provides anopen-ended passage-way between the arbor and the bushing for thecirculation of air. The circulation is assisted by arranging the lead ofthe threads so that they will act upon the air like a screw propeller orfan and force the air through the passageway from end to end. By thismeans I prevent the parts from heating, since the circulation of aireffectually cools them.

Having thus explained the nature of the invention and described a way ofconstructing and using the same, though without at tempting to set forthall of the forms in which it may be made or all of the modes of its use,it is declared that what is claimed is 1. In an edge-trimming machine,the combination of an arbor, a cutter thereon, a nonexpansiblelongitudinallyyielding thimble between the arbor and the cutter tocenter the cutter, and means for securing said cutter to said arbor.

2. In an edge-trimming machine, the combination of a cylindrical arborhaving a shoulder or abutment thereon, a cutter on said arbor, a thimblehaving a tapering portion slidingly mounted on said arbor whereby it isadapted to be wedged between the cutter and the arbor, and a screw forclamping the cutter against the said shoulder or abutment.

3. In an edge-trimming machine the combination of an arbor, a cutter, arand-guard bearing against the end of the cutter, a screw passed throughsaid guard into the arbor, and a yi'eldinglymounted taperednon-expansible thimble between the arbor and the cutter to center thelatter.

4. In an edge-trimming machine, the combination of an arbor, a cutter, arand-guard bearing against the end of the cutter, a screw passed throughsaid guard into the arbor, a flange or abutment secured to the arboragainst which the cutter is clamped by the screw and rand-guard, and aspring-tensioned centering-thimble between the arbor and the cutter.

5. In an edge-trimming and feather-edging machine, an arbor, a cuttersecured thereto, a bushing, buffer-blades slidably supported thereon, anexpansible shell between said bushing and the arbor to rigidly securethe former to the latter and to center it thereon and means forexpanding said shell.

(3. In an edge-trimming and feather-edging machine, an arbor, a cuttersecured thereto, a feather-edger, a sleeve secured upon said arbor andhaving an external tapering pora sleeve secured to said arbor, abushing, a feather-edger slidingly mounted on said sleeve, an expansiblewedging-shell between the sleeve and bushing, and a collar threaded onsaid sleeve for moving said split shell longitudinally to expand it.

In testimony whereof I have affixed my sig- 2o nature in presence of twowitnesses.

FREDERICK M. FURBER.

Witnesses:

ALBERT M. CHILD, JAMES E. BARTLETT.

